diff --git a/examples/language_model/README.md b/examples/language_model/README.md
index 6199e69ec..8c7da50f3 100644
--- a/examples/language_model/README.md
+++ b/examples/language_model/README.md
@@ -51,7 +51,7 @@ fairseq-preprocess \
     --only-source \
     --trainpref $TEXT/wiki.train.tokens \
     --validpref $TEXT/wiki.valid.tokens \
-    --testpref $TEXT/wiki.test.tokens \ 
+    --testpref $TEXT/wiki.test.tokens \
     --destdir data-bin/wikitext-103 \
     --workers 20
 ```